There is a red light flashing on the smoke alarm in the bedroom. Is it a camera? Can you cover it?

It's not a camera, it's a sensor. It is a detection device, which can sense the measured information and convert the sensed information into electrical signals or other required forms of information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control. Let the object have senses such as touch, taste and smell, and let the object slowly become alive.

main feature

The characteristics of sensors include miniaturization, digitalization, intelligence, multifunction, systematization and networking. It not only promotes the transformation and upgrading of traditional industries, but also may establish new industries, thus becoming a new economic growth point in 2 1 century.

Miniaturization is based on MEMS technology, and has been successfully applied to silicon devices to make silicon pressure sensors.